Axle-turning lathe



Feb. 2 1926.

L. C. COLE ET AL AXLE TURNING LATI-IE Filed March 19, 1924 5Sheets-Sheet 1 IN VEN THS .A TTURNEY L. c. CQLE ET AL.

AXLE TURNING LATHE Filed March 19, 1924 5 SheS-Sheet 5 Feb. 2 1926.

L. C. COLE ET Al? AXLE TURNING LATHE Filed March '19, 1924 5Sheets-Sheet 4 Feb. 2, 1926,.

Feb. 2 1926.

L. C. COLE ET AL AXLE TURNlNG LATHE Filed March 19, 1924 `5 Sheets-Sheet5 falls.

Patented Fei?, 2, 1926.

UNITED STATI-:sA

PATENT oFFlcs. l

' LYNnoN c. coLE AND or'ro rans'r, or HAMILTON, omo, AssroNons .'roNinna-Bni KENT-POND COMPANY, 0F NEW YORK, N. Y., CORPORATION OF N'EWJERSEY.

AXIM-TURNING LATHE.

Application led Harch 19, 1924. Serial No. 700,286.

To all. whom, t may concern.' A Be it known that we, LYNDON C. Conn andO'r'ro PABs'r, citizens of the United States.' and residents ofHamilton, inthe county of Butler and State of Chim-have invented certainnew and useful VImprovements in Axle-Turning Lathes, of which thefollowing is a specification.

This invention relates to lathes and particularly to an improved axleturning lathe. Car wheel axles require a plurality ofheavy turningoperations on each end thereof to rough cut and finish the severalworking surfaces. These surfacesi'nclude the wheel seat, dust guard,journal, and flange of the axle as hereinafter more fully described. Inaccordance with the invention, the lathe bed is provided with the usualmeans for supporting an axle at its ends and for rotating the same fromthe center thereof. A pair of tool carriages are provided on the bedrespectively at opposite sides of `the center driving means, and a toolslide havlng a tool turret thereon is mounted on each carriage'. Eachlturret is adapted'tov carry a plurality of formed turning tools'whichmay be successively brought into cutting posltion by indexing theturret. Also mounted on each carriage is a cam having an undulatory campath including a plurality of rises and A cam follower engages each campath and is operative on its tool slide to intermittently engage ,thetools with the ,work as the cam rotates, the turret being adapted to beindexed between the intermittent tool engagements wherebydifferent toolsoperate on the work. As illustrated and described, six turningoperations are required 'to completely finish each end of the axle orwork piece. Each cam is therefore provided w1th six undulations wherebyeach tool slide is moved toward and from the work six times at eachcomplete rotation of itsl cam, the machine thereby being adapted tocompletely finish turning an axle during one complete rotation of thecams. The primary object of the invention is to provide an improvedcam-actuated turning lathe of this general type.

l Each turret as herein illustrated and de,- scribed is adapted to carrytwo roughing tools and two finishing tools and these tools are adaptedto perform four cutting operations on the work merely by indexing theturret. The remaining two cutting opera;-

tions, above referred to arev performed by two of these tools after thtraversed'to position the turret opposite another portion of the work.INovel means including a rack on each carriage engaged by a pinion onthevbed and operated-by an independent electric motor is provided for.performing this'carriage traversing operation. Alathe apron is securedto the front face of the bedbeneath each carriage and Lhouses gearingthrough which the said pinion may be either manually or ymotor operatedto traverse the carriage. Another object of the invention is theprovision of this improved carriage traversing mechamsm. v

As illustrated and described, a main motor is provided for rotating thework and the tool slide operating cams for performing the cuttingoperations. Other means including an electrlc-motorfor each cam isprovided e carriage has beenk for independently rotating the cams and Ipendent cam adjusting and tool slide trav-y ersing mechanism of thistype.

As illustrated in the drawings, the tool slide operating cams arepreferably located at the rear side of the machine and the tooltraversing the tool slides. Each of these y slides at thefront sidethereof. Another specification, we have shown certain embodiments .ofour invention in a cam-actuated axle turning lathe but it will beunderstood that the invention can, be otherwise embodied and that thedrawings are not to be construed as' defining or limiting the scope ofthe invention', the claims appended to this specification being reliedupon for that purpose. f v

Referring to the figures of the drawings: e Figure 1 is a frontelevation of an axle turning lathe embodying our invention.

Fig. 2 is a rear elevation thereof. Fig. 3 is a plan view thereof.

Fig. 4 is a cross section thereof on line 4 4 of Fig. 3. l

Fig. 5 is an enlarged fragmentary plan view thereof. l e

Fig. 6 is an enlarged fragmentary rear View of a portion of the machine.

Fig. 7 is a cross sect-ional view similar` to Fig. 4.

Fig. 8 is a development of one of the tool slide operating cams.

Fig. 9 is a diagrammatic View of the lathe operating mechanism.

Referring to the drawings1 indicates the bed of our improved lathe onone end of which is mounted a head'stock2 and a main driving motor 3. Apair of work engaging centers 4 are supported in stocks 5 and 6adjustably mounted on the ways 7 of the bed. Work rotating means of thetype shown in Patent No. 1,226,051 is housed within a head 8 mounted onthe Ways 7 between the said stocks. A pair of tool carriages 9 areslidably mounted on the ways respectively at opposite sides of themember 8. These carriages and the mechanism cooperating with each aresubstantially identical as are also the turning operations per.

formed on the two ends of the axle W.

A tool slide 10 is mounted on a transverse guide-'way 11 on eachcarriage and a to`ol turret 12 adjustable about a verticaly axis 13 ismounted on each slide. Four finishing tools or blades are mounted900.apart on each turret. These tools comprise a. Wide roughing blade 14and a corresponding finishing blade 15 and a smaller roughing blade 16and a corresponding finishing blade 17. Eachturret can be indexed Aaboutthe axis 13 to h-ring any tool thereon into cutting position and theturret can then be secured in such position by a handle 18 and a wedge18.

As illustrated, the slidesl() are mounted on the.forward ends of thecarriages 9. Means for operating .each slide is housed within a box 19on the rear of the carriage. A cam drum 20 is rotatably mounted in eachbox 19 and each drum is provided with an undulatory cam path 21 thereinhaving six rises and falls. A block 22 on each carliage has a roller 23engaging in the cam path 21. A rod 24 adjustably connects each block toits respective tool slide 10. It will be observed that as the camsrotate, their respective tool slides are reciprocated in a mannercorresponding to the cam paths. I

Each end of the axle W, Shown in' the drawings, requires the cuttingvand finishing of four working surfaces, namely, the wheel seat W', thedust guard -W2, the journal W8,

andthe flange VW. The turning of these tor shaft meshes with a gear 26on a shaft 27 also carrying a pinion 28. The gear 26 meshes with a` gear-29 loose on a shaft 30 and the pinion 28 meshes with a gear 31 alsoloose on theshaft 30. A clutch 32 is splined to the shaft 30 betweengears 29 and 31 and a handle 33 is adapted to engage the clutch witheither f such gears. The shaft 30 can therefore be driven at either oftwo speeds from the motor 3. A pinion 34 on the shaft 30 meshes with agear 35 onI a shaft 36 extending along the bed 1 between the ways 7. Apinion 37 splined to this shaft is in mesh With the usual work drivinggear 38, the pinion37 and gear 38 being housed Within the head 8. Thedetails of this ,Work driving mechanism are. fully shown in the abovecited patent.

A pinion 39 on the shaft 36 is in mesh with a gear 40 on a shaft 41. Twogears 42 and .43 on the shaft 41 are respectively in mesh with two gears44 and 45 loose on a shaft 46. A gear 47 splined to the shaft 46 can beshifted into mesh with a gear 48 on the shaft 41. The opposite faces ofthe gear 47 have clutch teeth adapted to cooperate with clutch teeth onthe adjacent faces of gears 44 and 45 and the gear 47 can be shifted bymeans ofa handle 49 into any one of its three positions. The shaft 46can therefore be driven at, any one of three speeds from the shaft 36.

A pinion 50 on the shaft 46 is in mesh with a gear 51 on a shaft 52. Agear 53 on the shaft-52 is operatively connected to a gear 54 on a shaft55 through an idler gear 56. The shaft55, which may be termed the feedshaft, extends longitudinally of the bed beneath the boxes 19. Journaledwithin each box 19 and loose on the feed shaft 55 is a sleeve 57carrying. on one end thereof a Worm58 in mesh with ax worm wheel 59 on ashaft 60, A pinion 61 on the shaft 60 is in mesh with a gear 62 on thecam drum. One port-ion 63 of a friction clutch is secured to the yotherend ofthe sleeve 57, a cooperating portion of the clutch being splinedto the shaft 55. A clutch engaging member 64 is slidable on the shaft 55and can be shifted by means of a yoke 65 into and out of clutch engagingposition. We prefer to operate each of these clutch shifting yokes by asmall electric motor 66, a worm 67 on each motor shaft meshing with wormwheel teeth on the just the cam drums 20 and to independently y andrapidly rotate such drums for the purpose of providing a rapid traverseof the tool slides 10. As illustrated in the drawings, we prefer toperform this operation by independent electric motors 7 0, one for eachdrum. A shaft 71 is operatively connected by bevel gears72 to eachmotor, one end of `this shaft being squared for hand'operation.

A ,pinion 73 on the shaft 71 is in mesh with gear teeth on the clutchelement 63. When either clutch 63-64 is disengaged, the adjacent camdrum can be operated from theV motor or manually operated from the shaft71. It will be understood that this en' tire traversing mechanism asjust described iscarried by the carriage 9 Within the box 19 thereon.

The position of each tool slide 10 depends upon the angular or rotarypositionof its operating cam drum` 20. The following index means isprovided for indicating such position of the drums to the loperator atall times. i An indexed dial' 74 is rotatably mounted on the. front ofeach carriage. A pinion 75 on a rearwardly extending shaft 76 is in meshwithgear -teeth on this dial. A gear 77 on the rear. end of each shaft76 is in mesh with its cam drum gear 62. Therefore as each cam drumrotates, its dial 74 Will be rotated a -corresponding amount and therebyat all times indicate the exact position of the drum.

As beforestated, four turning operations are performed merely byindexing the turret 12. To perform the remaining two of the sixoperations, heretofore referred to, the carriage 9 must be traversed onthe ways 7 to position the turret opposite another portion of the work.rlhe following novel carriage traversing mechanism is provided for thispurpose.

As illustrated, a pair of racks 78 are secured to each carriagerespectively adjacent the Ways 7. A pair of pinions 79 on a transverseshaft 80 are respectively in mesh with these racks.

front of the bed .beneath each carriage, and

gearing is housed within the apron for operating the shaft 80 eitherfrom a hand.

An apron 81 is secured to the mesh witha gear 88011 the shaft l85. Thelmotor is operatively connected to the shaft 85 through 'the drivingconnectlons illus- ,trated at 89 in Fig. 9. It will be understood thatthe carriages are ordinarily traversed only a comparatively shortdistance but that such traversing is necessary to comfpletely finisheach work piece. As illustrated, each carriage can be independentlytraversed eitherl from the hand wheel 82 or from the motor 83.'

The operation of themachine in turning an axle W is as follows:Initially, the cam drums 20 being adjusted to they position shown inFig. l, the axle is mounted on the centers 4, it being assumed that theclutch 32 and gear 47 have been shifted to their proper positions, thatthe clutches 63-64 are inthe disengaged position, and that the turrets12 and carriages 9 are in the starting position illustrated in Fig. 3.The/motor 3 is then started and the work piece W rotated thereby.

The first operation to bev performed is the rough turning of the flangeV* and the dust guard W2 by the roughing tool 14. As 1l,-` lustrated inFig. 3, the tool is a considerable distance away from the work piece.erator first rotates one cam drum 20, through its motor 70, to quicklytraverse the tool slide 1() inwardly to its approximate Work engagingposition. The corresponding'clutch (S3-64 is then closed by its motor 66and rotation of the cam drum is thereupon autoinatically continued atfeeding speed by the shaft 55. The flange 74" and dustguard 72 aretherefore rough turned by the tool l4as the roller 23 continues totravel along the rise 21a of the cam drum, it being understood that theconnection at 24 is so adjusted that the turning operation iscomoperation on the other end of the axle in the same manner. As abovestated, when the roller 23y reaches the top of the cam rise 21a andstarts down the fall 21b o-f the cam path, the rough turning of thesurfaces Wt and W2 are completed. The next operation is to iinishturning such surfaces with the finishing tool 15. The operator thereupondisengages the clutch 63-64 and quickly rotrates the drum 20,by its`motor 70, to traverse the tool slide to its outward position (Fig. 3).The turret is then indexed to bring the tool '1,5 into cutting position.The cam drum is then again quickly rotated from its motor 70 to bringthe tool 15 up to the Work piece and the clutch 6'3-64 is closed asbefore. lNhile this finish turning operation is progressing, theoperator attends-to the adjusting'of the .mechanism at The opinprogress, the operator starts the turning ward position (Fi 3), i Theturret is then indexed to place t e rough journal turning tool 16 incutting positlon. The drum is then again quickly rotated to bring thetool to the work, the clutch 63-64 thereafter being closed and-theturning operation progrossing automatically as the roller 23 travels upthe cam rise 21". The journalk is thereafter finish turned by the tool17 in the manner above described, the roller riding up the cam rise 21ffor this operation.

After the finish turning of the journal 73, the next operation is therough turn'ino" yof the-wheel seat NV by the roughing too'l 14. Theclutch (i3-64 is disconnected and the cam drum is quickly rotated tobring the tool slide to its outward position (Fig. 3),' the roller 2 3riding down the cam fall 21g for this operation. The o erator thenindexes the turret to bring the tool 14 into cutting position andfurthermore traverse the carriage 9 along the bed to bring the tool 14opposite the portion W 0f the work piece. This carriage traversingoperation is performed by the motor 83, anyl fine adjustments beingaccomplished through the hand wheel 82, if desired. The scat W y isthereafter rough and finish turned in the same manner above described,the roller 23 i riding up the cam rises 21h and 2li for theseoperations.

As shown in Fig. 3,'the cam drum 20 has six rises andfalls whichcorrespond to the six turning operations to be performed to completelyturn the work piece. It will therefore be understood that an axle iscompletely turned at each complete rotation of the cam drums. Theindependent rotation or adjustment of the cam drums from the motors is`each 4independent of the other and while a turning operation is beingautomatically performed on one end of the axle the operatorie free toadjust the mechanism at the other end thereof. It should furthermore benoted that should the roller 23 ride past one of the camrisesandconsiderably into the succeeding cam4 fall before the operator couldattend the same, no harm would result, the tool slide 10 merely beingmoved away from the Work piece at' slow speed from the shaft 55. Theoperator therefore has plenty of time to make the necessary adjustmentsabove described the machine otherwise being substantially automatic. Themotors 3, 66, 70

and 83 can be controlled from switches located in a control box 90 onthe head 8 between the two tool carriages.

What we claim is:

1. In a lathe, the combination of a bed 'having Ways extending lonitudinally therealong, .means for ,rotatab y supporting a work piece onthe bed, a carriage slidable on the ways, a tool slide movabletransverselv of the ways on the carriage, a turret on the slide adaptedto support a plurality of formed tools, a rotary cam having anundulatoryV cam ath including a plurality of rises and fal s, meansengaging in the earn path and operatively connected to the slide, and apower element for rotating the work and cam, rotation of the cam beingadapted to reciprocate the slide toward and from the Work and the turretbeing adapted to be indexed and the carriage traversed betweensuccessive reciprocations.

2. In a lathe, the combination of means for rotatably supporting a workpiece, a tool slide movable transversely of the rotary axis of the saidmeans, a turret on the slide adapted to support a plurality of formedtools, a rotary cam having an undulatory cam path including a pluralityof rises and falls, means engaging in the cam path and operativelyconnected to the slide, rotation of the cam being adapted to reciprocatethe slide toward and from the work and the turret being adapted to beindexed between successive reciprocations, power means for rotating thework and cam for performing the cutting operations, and means includingan independent motor for independently rotating the cam.

3. In a lathe, the combination of means for rotatably supporting a workpiece, a tool slide movable transverselyE of the rotary axis of the saidmeans, a turret on the slide adapted to support a plurality of formedtools, a rotary cam having an undulatory cam path including a pluralityof rises and falls, means engaging in the cam path and operativelyconnected t'o the slide, rotation of the cam being adapted toreciprocateJ the slide toward and from the work and the turret beingadapted to be indexed lbetween successive reciprocations, power meansfor rotating the work and cam for performing the cutting operations, anindependent motor operatively connected to the cam, and means adjacentthe motor and cam fo r disconnecting the said power means from the camand motor. j

4. In a lathe, the combination of means for rotatably supporting a workpiece, a tool slide movable transversely of the rotary axis of the saidmeans, a turret on the slide adapted to support a plurality of formedtools, a rotary cam having an undulatory cam path including a pluralityof rises and falls, means engaging 1n the cam path and ret being adaptedto be indexed between successive reciprocations, power meansfor-rotating the work, a shaft driven from the s aid power means, asleeve on the shaft o eratively connected to the cam, an indepen entmotor operatively connected to the sleeve, and a clutch :for disenageably connecting the sleeve to the said s aft. A

5. In a lathe, the combination of means for rotatably supporting a workpiece, a tool slide movable transversely of the rotary axis of the saidmeans, a turret on the slide adapted to support a plurality offormedtools, a rotary cam having an undulatory cam path including aplurality of rises and falls, means engaging in the cam path andoperatively connected to the slide, rotation of the cam beingadapted toreciprocate the slide toward and 'from the work and the turret beingadapted to be indexed between successive reciprocations, power means forrotating the work and cam for performing the c utting operations, meansincluding an independent -motor for independently rotating the cam, aclutch between the motor and power means, and a second motor l:forshifting the clutch. l

(i. In a lathe, the combination of work sup-- porting and rotatingmeans, a tool slide movable transversely of the rotary axis of the saidmeans, a turret on the slide adapted to support a plurality of formedtools, av

rotary cam having an undulatory cam path including a plurality of risesand falls, means engaging in the cam path and operatively connected tothe slide, rotation of the cam being adapted to reciprocate the slidetoward and from the work and the turret being adapted to be indexedbetween successive i'eciprocati'ons, and index means operativelyconnected to the cam and adapted to indicate the rotary positionthereof.

7. In a lathe, the combination of work supporting and rotating means, atool slide movable transversely of the rotary axis of the said means, aturret on the slide at the front side of thesaid axis, the turret beingadapted to carry a plurality of formed tools, a rotary cam on the rearside of the said axis, the cam having an undulatory cam path including aplurality of rises and falls, means engaging in the cam path andvoperatively connected to the slide, rotation 'of the cambeing adaptedto reciprocate the slide toward and from the work'and the turret beingadapted to be indexed between successive reciprocations, and index meansat the front side of the machine, the index means being operativelyconnected to the camand adapted to indicate the rotary position thereof.

8. In a lathe, the combination of a bed having ways extendinglongitudinally therealong, means for vrotatably supporting a work pieceon the bed, a carriage slidable on the ways, a tool slide movabletransversely of the ways on the carriage, a turret on the slide adaptedto supportl a plurality of formed tools, a rotary cam havinfr anundulatory cam path including a plurality of rises and falls, meansengaging` in the cam Apath and operatively connected to the slide,

a power element for rotating the work and cam, rotation of the cam beingadapted to reciprocate the slide toward and from the work and the turretbeing adapted to be indexed and the carriage traversed betweensuccessive reciprocations, power means for traversing the 'carriagealong the bed, and manually operated means for controlling the saidpower means.

9. In .'a lathe, the combination of a bed having ways extendinglongitudinally therealong, means for rotatably supporting la Work pieceon the bed, a carriage slidable on the ways, a tool slide movabletransversely of the ways on the carriage, a turrent on the slide adaptedto support a plurality of formed tools, a rotary cam having anundulatory cam path including a plurality of rises and falls, meansengaging the cam path and operating on the slide to intermittentlyengage the tools with the work as the ca'm rotates, and means includingan electric motor for traversing the carriage along the bed.

the ways, a tool slide movable transversely of the wayson the carriage,a turret on the slide adapted to support a plurality of formed tools, arotary cam having an undulatory cam path including a plurality of risesand falls, means engaging the cani path and operating on the slide tointermittently engage the tools with the Work asl the cani rotates, arack on the carriage, a pinion on the bed in mesh with the rack, a latheapron secured to the front of the bed, and means including gearinghoused within the apron for selectively rotating the pinion by handlrdpower to traverse the-carriage along the 11. In a lathe, thecombination ol. a bed, having Ways extending longitudinally therealong,means for rotatably; supporting a work: piece on the bed, a carriageslidable on the ways, a tooll slide movable transversely of the ways onthe carriage, a turret on the slide adapted to support a plurality offormed tools, a rotary cam having an undulatory cam path including aplurality of rises and falls, means engaging the cam path and operatingon the slide to intermittently rotates, a rack on the carriage, a pinionon the bed in mesh with the rack, and a motor on the bed for rotatingthe pinion to traverse the carriage along the bed.

12. In a lathe, the combination of a bed having ways extendinglongitudinally therealong, means for rotatably supporting a work pieceon the bed, a carriage slidable on the ways, a tool slide movabletransversely of the Ways on the carriage, a turret on the slide adaptedto support a plurality of formed tools, a rotary cam having anundulatory cam ath including a plurality of rises and fa ls, meansengaging the cam path and operatin on the slide to intermittently engaget e tools with the work as the cam rotates, two racks respectivelymounted on the carriage adjacent the said ways, a pair of pinions on thebed respectively engaging the racks, and power operated means forrotating the pinions to traverse the carriage along the bed.

13. In an axle turning lathe, the combination of a. bed having waysextending longitudinally therealong, a pair of work suportinv members onthe bed Work enaofino D 3 b b D the cuttin and rotating means betweenthe said members, a pair of carria es on the ways respectively atopposite sides of the work rotating means, a tool slide on eachcarriage, a tool turret on each slide, each turret being adapted tosupport a. plurality of formed tools, a rotary cam `on each carriage,each cam having an undulatory cam path including a plurality of risesand falls, and means engaging each cam path and operating on itsrespective slide to intermittently engage the tools thereof with thework as the cams rotate, the turrets being adapted to be indexed betweenthe intermittent tool engage- -ments whereby di'erent tools thereofoperate on the work.

14. In an axle turning lathe, the combination of a bed having waysextending longitudinallytherealong, a pair of work supporting members onthe bed, work driving means between the said members, a pair ofcarriages' on the ways respectively at opposite sides of the workrotating means, a tool slide on each carriage, a tool turret on eachslide, each turret being adapted to support aplurality of formed tools,a rotary cam on each carriage, powerl means for rotating the work andcams for' performing operations, means for rotating the camsindependently of the said power means, each cam having an undulatory campath including a plurahty of rises and falls, and means engaging 'eachcam vpath and operating on its respective slide to intermittently engagethe tools thereof with the work as the cams rotate, the turrets beingadaptedto be indexed between the intermittent tool engagements wherebydifferent tools thereof operate on the work.

15. In 'an axle turning lathe, the combination of a bed having waysextending longitudinally therealong, a pair of work supporting memberson the bed, work driving means between the said members, a pair ofcarriages on the ways respectively at opposite sides of the workrotating mea-ns, a tool slide on each carriage, a tool turret on eachslide, each turret being adapted t0 support a plurality of formed tools,a rotary cam on each carriage power means for rotating the work and camsfor performing the cutting operations, electric motor means forr'otating the cams independently of the said power means, each camhaving an undulatory cam path including a plurality lof rises and falls,and means engaging each cam path and operating on its respective slideto intermittently engage the tools thereof with the work as the camsrotate,the turrets being adapted to be indexed. between the intermittenttool engagements whereby diii'ercnt tools thereof operate on the work.

16. In an axle turning-lathe, the combination of a bed havingwaysextending longitudinally therealong, a pair of work supporting memberson the bed, work driving means between ,the said members, -a pair of'carriages on the ways respectively at oppo- -ste sides of the workrotating means, a

tool slide on each carriage, a tool turret on each slide, each turretbeing adapted to support a plurality of formed tools, a rotary cam oneach carriage, power mea-ns for rotating the work and cams forperforming the cutting operations, power operated means for traversingthe carriages, power operated means for rotatably adjusting the cams,cach cam having an undulatory cam path including a plurality of risesand falls, and means engaging each cam path and operating on itsrespective slide to intermittently engage the tools thereof with thework as the cams rotate, the turrets being adapted tp be indexed betweenthe intermittent tool engagements whereby different tools thereofoperate on the work.

17 In an axle turning lathe, the combination of a bed having waysextending longitudinally therea-long, a pair of work sup-l portingmembers on thel bed, work driving means between the said members, a pairof. carriages on the ways respectively at opposite sides of the workrotating means, a tool slide on each carriage, a tool turret on eachslide, each turret being adapted to support a plurality pf formed tools,a rotary cam on each carriage, power means forjrotating the work andcams for performing'lthe cutting operations, electric motor means fortraversing `lthe carriages, electric motor mea-ns for- .rotatably-adjusting the cams independently of the said power means, each camhaving an undulatory cam path including a plurality of rises and falls,and means engaging each cam path and operating on its respective slideto intermittently engage the tools thereof with the work as the camsrotate, the turrets being adapted to be-indexed between the intermittenttool engagements whereby different tools thereof'operate on the work.

18. In Ian axle turning lathe, the combination of abed having Waysextending longitudinaly therealong, a pair of work supporting members onthe bed, work driving means between the said members, a pair ofcarriages on the ways respectively at opposite sides of the workrotating means, a tool slide on each carriage, a tool turret on each fslide, each turret being adapted to support a plurality of formed tools,a rotary cam on each carriage, power means for rotating the work andcams for performing the cutting operations, an electric motor on, eachcarriage for independentlyl traversing the carriages, two electricmotors for respectively and independently rotating the cams,each camhaving an undulatory cam path including a plurality of rises and falls,and means engaging each cam path and operating on its respective slideto intermittently engage the tools thereof with 'the work as the camsrotate, the turrets being adapted to be indexed between the intermittenttool engagements whereby different tools thereof operate on the work.

19. In an axle turning lathe, the combination of a bed having waysextending longitudinally therealong, a pair of work supporting memberson the bed, work driving means between the said members, a pair ofcarriages von the ways respectively at opposite sides of the workrotating means, a tool slide on each carriage, a tool turret on eachslide, each turret bemg adapted to support a plurality of formed tools,a rotary cam on each carriage, each cam having an undulatory cam pathincluding a plurality of rises and falls, power means for rotating thework and cams for performing the cut- 'ting operations, means forrotating the cams ersing the carriage along the bed, and

means engaging each cam path and operat- Ving on its respective slide tointermittently engage the tools thereof with the work as the camsrotate, the turret being adapted to be indexed between the intermittenttool engagements whereby dierent tools thereof operate on the work.

20. In a lathe, the combination of a bed having ways extendinglongitudinally therealong, a tool carriage slidably mounted on the ways,a lathe apron secured to the liront of the bed adjacent the carriage,carriage traversing means including gearing housed withinthe apron, apair of racks secured to the carriage respectively adjacent the saidways, a pair of pinions on the bed in mesh with the racks, and anoperative 'connection from the said traversing means to the pinions.`

21. In a lathe, the combination of a lbed having ways extendinglongitudinally therealong, a tool carriage slidably lmounted on theways, a lathe apron secured to the front of the bed adjacent thecarriage, carriage traversing means including gearing housed within theapron, a rack secured to the carriage, a pinion on the bed in mesh withvthe rack, an operative connection from the said traversing means to thepinion, a motor secured to the bed adjacent the apron, 'and means forselectively operating the traversin means by the motor and by hand.

n testimony whereof, wey hereto aiiix our signatures.

LYNDON C. COLE. OTTO PABST.

